I-MR-R Chart in Excel using QI Macros

The Individual Moving Range, Range Chart is a combination of XbarR and XmR Chart. It gives both "within" group and "between" group variation. Th I-MR-R chart:

• Calculates the average of subgroups, just like an XbarR
• Creates the Range chart (within group variation) just like the XbarR
• Creates a Moving Range Chart (between group variation) like an XmR using the average of the subgroups
• Creates the Individuals Chart like an XmR using the average of the subgroups

Analyze Variation with a I-MR-R Control Chart

How to Create an I-MR-R Chart Using QI Macros Add-in for Excel:

1. Select two or more columns of data.
   
2. Click on the QI Macros tab installed on Excel's menu and, select Control Charts then "I-MR-R chart".
3. QI Macros will do the math and draw the charts for you and turn unstable points or conditions red.
   
4. Analyze and interpret the results:
   • Evaluate the range charts first. If they are "out of control," so is the process. If the range charts look okay, then evaluate the X chart.
   • Investigate unstable points or trends

---

Why Choose QI Macros Over Other Control Chart Software?